EXPERIMENTAL STUDY ON BENDING BEHAVIOR OF C80 CONCRETE BEAMS AT EARLY AGE

Wang Dongyan; Wu Yuegang; Yang Zhenkun; Wang Mengmeng; Yuan Quan; Liao Juan; Wei Yongbin

doi:10.13204/j.gyjz201312015

Volume 43 Issue 12

Dec. 2014

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Wang Dongyan, Wu Yuegang, Yang Zhenkun, Wang Mengmeng, Yuan Quan, Liao Juan, Wei Yongbin. EXPERIMENTAL STUDY ON BENDING BEHAVIOR OF C80 CONCRETE BEAMS AT EARLY AGE[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(12): 82-87. doi: 10.13204/j.gyjz201312015

Citation:

Wang Dongyan, Wu Yuegang, Yang Zhenkun, Wang Mengmeng, Yuan Quan, Liao Juan, Wei Yongbin. EXPERIMENTAL STUDY ON BENDING BEHAVIOR OF C80 CONCRETE BEAMS AT EARLY AGE[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(12): 82-87. doi: 10.13204/j.gyjz201312015

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EXPERIMENTAL STUDY ON BENDING BEHAVIOR OF C80 CONCRETE BEAMS AT EARLY AGE

doi: 10.13204/j.gyjz201312015

1.
1. China State Construction Engrg. Corp. Ltd. Technical Center,Beijing 101300,China;
2.
2. School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China

Received Date: 2013-06-25
Publish Date: 2013-12-20

Abstract

Abstract

Through bending experiments the paper tested the flexural behaviors of 8 C80 high strength reinforced concrete beams，whose failure modes were studied; and deflections，strains and cracks development were also measured and recorded at 1，3，7，28，90 d. In order to study the influence of the early load (50% of ultimate compressive strength) on the long-term performance of beams，it was also carried out the tests in which beams were loaded to a level about 50% of ultimate compressive strength and then unloaded at the age of 1, 3, 7 d. After that the specimens were cured under natural conditions for 28 d and then were tested again. The two tests'results show that the cracking load，yield load and ultimate load of specimens in the concrete early age(3 d ago) were influenced by ages greatly and were affected little after 3 d，the degree was about 3% after 7 d. The ultimate moment of C80 reinforced concrete beams of 1 d age can reach the 90% of that of 28 d. The cross-section strains at various concrete ages were agreed with those of plane section assumption. The beam carried 50% ultimate load at concrete early age which has smaller influence on deformation capacity and greater one on carrying capacity.
- C80 high strength reinforcement concrete beam,
- early loading,
- experimental study,
- bending behavior

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References(11)

References

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